Re: [PATCH v2 2/3] nvmem: check for NULL reg_read and reg_write before dereferencing

[Srinivas Kandagatla]

On 02/03/2020 15:43, Nicholas Johnson wrote:
> Return -EPERM if reg_read is NULL in bin_attr_nvmem_read() or if
> reg_write is NULL in bin_attr_nvmem_write().
>
> This prevents NULL dereferences such as the one described in
> 03cd45d2e219 ("thunderbolt: Prevent crash if non-active NVMem file is
> read")
>
> Signed-off-by: Nicholas Johnson <nicholas.johnson-opensource@xxxxxxxxxxxxxx>
> ---
>   drivers/nvmem/nvmem-sysfs.c | 6 ++++++
>   1 file changed, 6 insertions(+)

Applied thanks,
--srini